September 21 - THE WORKBENCH CHALLENGE 2015!
Back in 2008, Nuts & Volts sponsored the $100 Workbench Challenge. It was a great success and we had plenty of readers enjoy participating in the contest and showing off their carefully crafted work spaces. With the changes in available tools and technology, we decided to bring the challenge back, but this time even bigger and with a lot more prizes! Our new two-part contest is a combination of straight-up workbench design and a bit of "show and tell." So, let’s get down to details. What exactly is the Workbench Challenge 2015? Check out the details...
September 15 Bryan Bergeron
With Amazon’s general release of the Echo home automation controller, it may be time to take a second look at the home automation market. I first took the plunge into commercial home automation several years ago with X10-compatible hardware (http://www.x10.com).
For the price of a bare-bones Echo ($180, www.Amazon.com), you can get a half dozen wireless timers and remotes for controlling lights, appliances, and your home security system. X10-compatible home automation devices are commodities — inexpensive, ubiquitous, and they work. Unfortunately, they’re also a bit boring.
At the other end of the home automation market are the cloudcompatible smart thermostats and cameras, typified by the Nest learning thermostat and Nest cam, respectively (www.nest.com). Both can be controlled through your smartphone from anywhere in the world. Plus, the learning thermostat is compatible with a variety of devices — from smart locks and sprinkler systems to ceiling fans.
If you want to make the Nest cam fully functional, you’ll have to pay a $10 monthly fee to Nest Aware — not something I’m prepared to do.
One of the advantages of the Amazon Echo is that it’s compatible with Belkin WeMo and Philips Hue devices. WeMo is compatible with standard Wi-Fi routers and iOS devices, such as the iPad. Hue — which is primarily for lighting — also works with a standard Wi-Fi router, and both iOS and Android tablets and smartphones.
I’ve used the Philips Hue lighting system with my iPhone for about a year. It’s expensive, however, at about $200 for a Wi-Fi/Hue bridge and three 60W equivalent LED bulbs. Which brings me to cost. The basic “star trek” package — which allows you to say the equivalent of “Computer, lights on” from anywhere in your living room — is about $400 — $180 for the Echo and $200 for a basic Philips Hue lighting system.
Add a few Belkin WeMo Wi-Fi switches for your existing lights or appliances, and you’re easily approaching $500. Still, this sort of off-the-shelf functionality that actually works was science fiction just a few years ago.
As Google, Apple, and now Amazon compete for the front end of the home automation market, there are likely to be more and more affordable peripherals and tools. More importantly — from an electronics enthusiast’s perspective — is the availability of inexpensive peripherals that can be easily torn down and repurposed for other uses. Think of replacing an RGB LED with three opto-isolators to control three servos, for example.
I think we just might have the “star trek” computer system of the 1960s. Now, someone needs to start working on the transporter, so we can say “Beam me up, Echo.” NV
Like a Segway, Sideway uses a lean angle to control speed. It uses a wireless Wii Nunchuk controller to manuover the two wheeled skateboard. The Sideway uses the Parallax Propeller with custom software for the IMU and control. There are two 280W, 24V electric scooter motors, one on each wheel, both driven by a Sabertooth 2x32A motor controller. It'll run for about 40 minutes +/- on a single charge.
A quick video showing the Sideway V2. Sideway is a self-balancing electric skateboard, designed and built by Jason Dorie
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Mouser Electronics, Inc. announced that it has signed a global distribution agreement with Adafruit. Adafruit was founded in 2005 by Massachusetts Institute of Technology (MIT) engineer Limor "Ladyada" Fried. Adafruit offers unique and fun DIY electronics, kits, andopen-source hardware that turn everyday objects into high-tech prototypes suitable for education and advanced production concepts.
Mouser Electronics will offer same-day shipping on the Adafruit product line, including the FLORA and GEMMAwearable electronic platforms. These small but powerful boards incorporate programming based on the Arduinointegrated development environment (IDE) through USB interface to give designers and entry-level makers alike the ability to easily create prototypes of wearable devices. The FLORA board includes 14 sewing tap pads for attachment and electrical connections on a 1.75 in. diameter body, and the even smaller GEMMA board puts its six sewing tap pads on a 1.1 in. diameter body.
Mouser will also stock the Adafruit HUZZAH ESP8266 breakout board, a tiny WiFi microcontroller based on the ESP8266 80MHz microcontroller. This breadboard-friendly module makes adding WiFi to projects easy with onboard WiFi antenna, I/O pins, and level shifting.
"Mouser is excited about this new partnership with Adafruit," said Russell Rasor, Mouser Vice President, Supplier Management. "With the growing popularity of the Maker and DIY movement, Adafruit will be a welcome addition to our lineup for open-source products. Customers across the globe now have access to an expanded offering of innovative products designed by experts with a passion for electronics education and inspiring the next generation of engineers."
"Mouser's global reach enables us to extend our customer base to offer powerful and easy-to-use products to people of all skill levels," said Limor "Ladyada" Fried, founder and engineer. "Known for their best-in-class distribution, renowned service and exceptional customer reach, Mouser is a valued strategic partner for us. We look forward to much success."
To learn more, visit http://www.mouser.com/adafruit/.
July 15 Bryan Bergeron
I’m in the middle of overhauling a vintage Singer 201-2 sewing machine, manufactured in the US in 1940. As I expected, the motor brushes need replacing, the oldfashioned leaf switch controlling the light is — at best — intermittent and needs a good cleaning, and the cottoninsulated wire is begging to be updated to fireproof silicon insulated wire. Old appliances — void of microcontrollers or even simple semiconductors — are a pleasure to tear down and rebuild. They’re fun as a solo weekend project, or, if you have someone you want to teach basic mechanics and electricity to, they make a good two or three weekend project. Even bringing an old toaster back to life can provide a sense of satisfaction.
Back to the Singer, there’s always more involved in a vintage repair than meets the eye. These old sewing machines require regular lubricating and cleaning like any other fine metal equipment. I’ve tried just about every grease on the market, and have come to rely on Tri-Flo clear grease. It’s a synthetic grease that’s fairly odorless, relatively inexpensive, and easy to come by. Just make certain you remove all of the old organic grease before you apply the Tri-Flo. The combination of old and new grease doesn’t perform well.
One of the unfortunate characteristics of lighted appliances from the middle of the last century is that they relied on inefficient 110V incandescent bulbs. The Singer uses a miniature 15W bulb that gets extremely hot — hot enough to blister the paint on the bulb holder. I’ve solved that problem by replacing the incandescent with a more efficient, much cooler LED version. An unanticipated advantage of moving to LED lighting is that the light is nearly pure white as opposed to yellow. You can find LED bulbs at Amazon, 100bulbs.com, and, of course, homedepot.com.
Replacing frayed power cords can be a challenge — especially when the appliance is designed for a non-polarized two-pronged connection to the mains. Arbitrarily connecting a three-pronged plug can be a hazard — especially on an appliance with a metal chassis. Unless you’re familiar with electrical code — as well as how your house is wired — I’d stick with the original wiring diagram. Do replace the brittle plastic cord with modern flexible cord. I’ve had good luck with non-polarized cords from both Amazon and Walmart.
Switches — especially power switches — are the most problematic components in a vintage repair. It’s usually easy enough to replace a toggle switch with a garden variety version, but it’s at the cost of destroying the “vintage” feel of the appliance. Take the Singer sewing machine switch. The toggle is a distinctive white Bakelite, and the mechanical aspect of the switch is almost two inches long. I was lucky enough to find a new old stock (NOS) replacement on eBay. Otherwise, I would have been forced to substitute a miniature toggle switch for the classic Bakelite toggle. I’ve found a great source of old fashioned switches is guitar supply houses and local music stores — especially stores that cater to the tube amp crowd.
So, next time you walk past a yard sale, check out the vintage electrical items. There’s always something to learn from a teardown, even if you have no need for the actual item. NV
Groundbreaking collaboration between 29 partners including ARM, Barclays, BBC, element14, Freescale, Lancaster University, Microsoft, Nordic Semiconductor, Samsung, ScienceScope, Technology Will Save Us and the Wellcome Trust to give a pocket-sized computer to every year 7 child in the UK for free; ambition to inspire digital creativity and develop a new generation of tech pioneers
The The BBC and partners today unveiled the BBC micro:bit – a pocket-sized, codeable computer that allows children to get creative with technology. In the BBC’s most ambitious education initiative for 30 years, up to 1 million devices will be given to every 11 or 12 year old child in year 7 or equivalent across the UK, for free.
BBC micro:bit is a pocket-sized computer that you can code, customise and control to bring your digital ideas, games and apps to life. Measuring 4cm by 5cm, and designed to be fun and easy to use, users can create anything from games and animations to scrolling stories at school, at home and on the go - all you need is imagination and creativity. The BBC micro:bit is completely programmable. That means each of its LEDS can be individually programmed as can its buttons, inputs and outputs, accelerometer, magnetometer and Bluetooth Smart Technology.
to read more about the BBC micro:bit, visit the BBC Website
Fountain Hills, AZ June 19, 2015 – Technologic Systems Inc., an embedded systems solutions company, has announced they will be releasing limited samples of their new high end, Single Board Computer (SBC), TS-7970 for engineering and early prototypes. The TS-7970 can fulfill a wide variety of embedded system requirements with high performance components, like a 1.2 GHz Single or Quad Core Cortex A9 ARM CPU, 512 MB to 2 GB DDR3 RAM, 4 GB eMMC Flash Storage, microSD card slot, Gigabit Ethernet, and available Wireless 802.11 b/g/n and Bluetooth radio. Full descriptions, pictures, and resources, including manuals and schematics, for the TS-7970 can be found on the Technologic Systems' TS-7970 product page.
TS-7970 Bottom View
The TS-7970 is a high performance single board computer based on the Freescale i.MX6 CPU which implements the ARM® Cortex™-A9 architecture clocked at 1 GHz (Single or Quad Core) and paired with with 1GB or 2GB of DDR3 RAM. Several industry standard interfaces and connections such as dual Gigabit Ethernet, WiFi and Bluetooth, USB, SATA II, and more make the TS-7970 a great fit for nearly any embedded systems application. A wide variety of software platforms are available including Linux and QNX (with Android and Windows support coming soon) for flexibility in matching your embedded system requirements.
- High Performance Embedded with Solo or Quad Freescale i.MX6 ARM CPU
- Wireless Connectivity for Remote Access and IoT-like Applications
- Protect Valuable Data with Robust and Reliable Storage Solution
- High Speed Industry Standard Connectors like Gigabit Ethernet and SATA II
- Engineered for Rugged, Industrial Environments
Magnetic field measurements play an important role in Earth-orbiting satellites, such as attitude determination and scientific instrument pointing. Unless built specifically for high accuracy measurements, satellites usually come with significant magnetic sources of errors that severely degrade measurement accuracy. This GSoC project aims to implement algorithms that enable low-cost high quality magnetic field measurements on smaller spacecraft without booms using the BeagleBone platform.
- Student: Niko Visnjic
- Mentors: Steve Arnold, Alexander Hiam, Kumar Abhishek
- Code: https://github.com/nvisnjic/BeagleSat
- Wiki: http://elinux.org/Neemo
- Blog: http://nvisnjic.com/beaglesat
- Melange: BeagleSat Proposal
June 15 Bryan Bergeron
While there’s satisfaction from getting an LED to blink five times in a row in response to a button press, it isn’t going to change the world — that is, unless you set your goals higher. It’s easy to lose track of the fact that electronics have changed human existence in only a few decades. Computers, TV, satellites, space exploration, drones, cell phones, robots, aviation, and modern automobiles are but a few examples. Against that backdrop, there’s a vast vacuum for experimentalists and engineers to fill. What I’m suggesting is that you take your knowledge of electronics — whatever your level of expertise — and focus it towards solving a meaningful problem.
I’m not suggesting you forgo experimenting with the basics such as triggering a microcontroller, but that you have a much larger purpose in mind — something to work toward other than simply acquiring knowledge for its own sake. For better or worse, there seems to be no end of problems to be solved.
Take the recent drought in California that negatively affects everyone in Silicon Valley. How can you leverage your knowledge of electronics to solve that dilemma? I don’t have the answer, of course, but I’d start with looking for energy efficient means of desalination, perhaps some means of remotely monitoring the hydration of crops, and perhaps image processing techniques that can be applied to readily available satellite telemetry to track water consumption.
I’m sure you can think of a few dozen other areas to explore. The point is, there is no end of problems that you can address with your skills as an experimentalist. History suggests that your odds of changing the world are better if you have a clear vision of what you’re going to accomplish, versus simply stumbling upon it. Of course, there are examples of accidental discoveries, but even then you have to be aware of the problems that need solving.
You might be reading this thinking what can you do at night in your basement, armed with a soldering iron and a few hundred parts? Well, others have done a great deal with much less computing power than is available on a common microcontroller. But it’s a fair comment. Fortunately, thanks to the Internet and other communications means available, there’s no need to go it alone.
Start something or find a group with a worthwhile cause and join it. If money is a hurdle, then consider crowdfunding. Look for internships or summer jobs with companies addressing problems you want to solve or that at least get you part of the way there.
Finally, if you’re young, seek out a mentor. I’ve been fortunate to find several over the years — each with a different perspective and skill set. Conversely, if you’re older and experienced, become a mentor. Leverage your experience with a younger, less experienced and possibly more energetic student. Either way, it tends to be a winwin situation. Go ahead, change the world. I dare you. NV
October 09, 2015
- The Golden Age Of Electronics
- RADAR And Electronic Warfare Fundamentals
- Understanding Digital Buffer, Gate, and Logic IC Circuits - Part 5
- What The L Is It?
- Smiley’s Workshop 20: Arduino Voltmeter
- THE WORKBENCH CHALLENGE 2015!
October 03, 2015
- A High Voltage Halloween
- Magnetic Saturation And The 100 Amp DC Current Transformer
- Lightning Screen
- Understanding Digital Buffer, Gate, and Logic IC Circuits - Part 4
- Smiley’s Workshop 19: A Simple Terminal
- THE WORKBENCH CHALLENGE 2015!
Need to brush up on your electronics principles? These multi-part series may be just what you need!